!399 Backport fs, block and net bugfixes

Merge Pull Request from: @zhangjialin11 
 
Pull fs bugfixes from Zhihao Cheng and ZhaoLong Wang
block bugfix from Yu Kuai
net bugfixes from Liu Jian 
 
Link:https://gitee.com/openeuler/kernel/pulls/399

 

Reviewed-by: Zheng Zengkai <zhengzengkai@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>